Mufflers

Mufflers

The mufflers on my Injection were actually sports car mufflers and were as ugly as sin. They were also nearly completely free flowing and that was resulting in a very lean mixture at high revs.

One advantage of the injection equipment was that between the Airflow and Boost sensors, it was able to compensate for a lot of the changes in flow caused by the mufflers and actually ran quite well.

The noise and bad looks finally got to me and I built some new mufflers from stainless steel that would look and perform as near to original as I could.

The alloy cap at far left I had cast and machined from an original part from another Injection that lives near by. The outer skins I had made by a local sheet metal shop because I needed a rolling machine to get a good finish. The disk baffles were profile cut and then all MIG welded together.

Here you can see the layout inside the muffler....

I then made brackets using the ones I found welded to the old car mufflers as a pattern. I had discovered at the last minute they were actually the original ones from the factory mufflers it had when new.

I then returned them to the sheet metal shop and they completed all the external welds with a TIG welder and polished them. I then painted the end caps and fitted them to the mufflers on the bike.

More to come.......